Trumpet or horn of sound-reproducing instruments.



No. 867,836. PATENTED OCT. 8, 1907.

R. REVELL.

TRUMPET OR HORN OF SOUND REPRODUGING INSTRUMENTS.

APPLICATION FILED JULY 21, 1906.

WITNESSES INVENTOR W M RMMW ATTORNEYS UNITED STATES PATENT OFFICE.

ROLAND REVELL, OF WEST HAHPSTEAD, LONDON, ENGLAND, ASS'IGNOR- TO THOMASKNIGHT BARNARD, OF STROUI), ENGLAND.

Specification of Letters Patent.

Patented Oct. 8, 1907..

Application filed July 21, 1906. Serial No. 327,233.

To all whom it may concern:

Be it known that I, ROLAND REVELL, a subject of the King oi- GreatBritain and Ireland, residing at Shirland Lodge, Goldhurst Terrace, WestHampstead, in the county of London, England, composer of music, haveinvented certain new and useful Improvements in Connection with theTrumpets or Horns of Sound- Reproducing Instruments, of which thefollowing is a specification.

This invention relates to horns for sound reproducing instruments, andparticularly to deflectors for such horns.

The object of my invention is to provide a satisfactory deflector whichmay beattached at the mouth of the horn and is so constructed as toafford an annular aperture through which the sound issuing from the hornis deflected practically horizontally in all directions at once. Inconnection with the deflector, I prefer to add also a sounding boardwhich may, for effect, he perforated. I

In the accompanying drawings Figure 1 is a vertical section of a hornprovided with my deflector with its accessory sounding board; Fig. 2 isa vertical section of.a horn showing my deflector without a soundingboard; F ig. 3 is a vertical section of a modified form of my deflector;while Fig.- 4 is a vertical section of the same, provided with asounding board.

At present the full power of sound from sound reproducing instruments isonly heard when a person is in front of the trumpet, or horn, the soundwaves being driven almost in a direct line, or only radiating to alimited extent, the result being that, if a sound reproducing instrumentemploying a trumpet or horn to increase the volume of sound, be playedin a room, and the person listening to the sound be directly in front ofthe trumpet, or horn, the power or blast from the 'trumpet or horn isgenerally too great to be pleasant, and if a person be behind, or attheside of, the trumpet or horn, that person does not hear the full effectof the instrument, in consequence of the sound waves being drivenforward from the front or bell of the trumpet or born. The consequenceis the volnine of tone is very unequally distributed about the room. Mydeflector distributes the sound waves from such instruments more equallyand also, to a great extent, prevents the unpleasant blast which nowexists with the ordinary trumpet or horn.

Referring to the drawings, it will be seen that I insert or mount insideor over, or both inside and over, the mouth or hell of the trumpet orhorn 1, a bell-shaped cone or other deflector 2, so as to leave anannular space for the passage of sound waves. The said bell-shaped cone,or deflector, can be held in position in or on the trumpet or horn bystays 3, or

other suitable means, which will prevent it from entering too far into,or will support it above, the mouth of the trumpet or horn. The effectof the said cone or deflector is to cause the sound waves to passequally through the said annular passage and so be better distributed.

Instead of fitting the trumpet or horn to the sound reproducinginstrument in a more or less horizontal position, as has been hithertocustomary, I prefer to arrange the said trumpet or horn, in a verticalor nearly vertical, position, with the opening of the bell orlarge endof the trumpet or horn directed upwards.

The cone or deflector may be solid, or it may be hollow, and it may beconstructed of any suitable material, such for example as metal, wood,celluloid,- or the like. If it be made hollow, it may be provided withan opening, or openings 4, and then it will form a sound chamber, or actas a soundboard, and improve, or modify, the sound.

In Fig. 2 I have shown a trumpet or horn made with a horizontallyextended lip 5 upon which the struts 3 support the deflector 2, which ismade with a small conical central part directed downwards at the mouthof the trumpet, or horn l, the outer part of the deflector extendingparallel with the lip. 5.

The same trumpet or horn can, if desired, be used in recording, or anordinary trumpet or horn may be used for that purpose.

, I claim as my invention 1. In combination with the trumpet or horn ofa sound reproducing-instrument, a sound deflector arranged at the mouthof the horn and secured to the latter and providing an annular aperturethrough which the sound is projected in all directions simultaneously ina plane practically at right angles to that at which it would normallyissue from the born.

2. In combination with the trumpet or horn of sound reproducinginstruments, a sound deflector arranged at the mouth of the horn andsecured to the latter and providing an annular aperture through whichthe sound is projected practically horizontally in all directionssimultaneously.

3. In combination with the trumpet or horn for sound reproducinginstruments arranged to discharge the sound in an approximately verticaldirection, a sound deflector arranged at the mouth of the horn andsecured to the latter and providing an annular aperture through whichthe sound is projected practically horizontally in all directionssimultaneously.

4. In combination with the trumpet or horn of sound reproducinginstruments, a sound deflector arranged at the mouth of the horn andsecured to the latter and providing an annular aperture through whichthe sound is projected in all directions simultaneously in a planepractically at right angles to that at which it would normally issuefrom the horn, and a sounding board coiiperating with said deflector.

5. In combination with the trumpet or horn 01' sound reproducinginstruments, a sound deflector arranged at the mouth of the horn andsecured to the latter and providing an annular aperture through whichthe sound is projected in all directions simultaneously in a planepractically at right angles to that at which it would normally issuefrom the 'horn, and a perforated sounding board cooperating with saiddeflector.

6. In combination with the trumpet or horn of a sound reproducinginstrument having a flared lip; a sound deflector arranged at the mouthof the horn and haying its 1 deflecting surface substantially parallelto the lip of the 10 horn, and providing in connection therewith anannular aperture through which the sound is projected in all directio'ns simultaneously in a plane practically atjright angles to thatat which it would normally issue from the signed this specification in15

